Fluid bed incineration catalyst

Abstract

The present invention relates to a process and a catalyst for the fluid bed incineration of a combustible hydrocarbon feedstock. The process comprises contacting the feedstock with a mixture of a fluidized heat transfer media and a combustion promoter catalyst, in the presence of an oxygen-containing gas stream in excess of that required for complete combustion of the carbon monoxide formed, at feedstock combustion conditions. The combustion promoter catalyst consists essentially of particulate with a particle size of greater than 150 microns and includes a promoter metal present in an amount to provide a substantially carbon monoxide-free flue gas.

That which is claimed is: 
     
       1. A combustion promoter catalyst comprising: a promoter support component comprising at least one member selected from the group consisting of mullite, spinel, alpha alumina, gamma alumina, delta alumina, eta alumina, silica, alumina, silica alumina, titania, zirconia, and sand;   a promoter metal carried by said promoter support component wherein said promoter metal comprises at least one member selected from the group consisting of the Group VIII metals and present in an amount of from about 10 ppm by weight to about 5000 ppm by weight of said combustion promoter catalyst;   said combustion promoter catalyst consisting essentially of particulate having a particle size of greater than 150 microns and having a Group B Geldart characterization.   
     
     
       2. The combustion promoter catalyst of claim 1 wherein said promoter support component comprises a substrate and a substrate coating, said substrate comprising at least one member selected from the group consisting of mullite, spinel, alpha alumina, and sand, and said substrate coating comprising at least one member selected from the group consisting of silica, alumina, titania, silica alumina, zirconia, gamma alumina, delta alumina, and eta alumina. 
     
     
       3. The combustion promoter catalyst of claim 1 wherein said promoter support comprises at least one member selected from the group consisting of alpha alumina, gamma alumina, silica alumina, and silica. 
     
     
       4. The combustion promoter catalyst of claim 1 wherein said promoter metal comprises from about 50 ppm by weight to about 3000 ppm by weight of said combustion promoter catalyst. 
     
     
       5. A combustion promoter catalyst comprising: a promoter support component comprising at least one member selected from the group consisting of alpha alumina, gamma alumina, silica alumina, and silica;   a promoter metal carried by said support component wherein said promoter metal comprises at least one member selected from the group consisting of the platinum metals and present in an amount from about 50 ppm by weight to about 3000 ppm by weight of said combustion promoter catalyst;   said combustion promoter catalyst consisting essentially of particulate having a particle size of greater than 150 microns and having a Group B Geldart characterization.   
     
     
       6. The combustion promoter catalyst of claim 5 wherein said promoter support comprises a substrate and a substrate coating wherein said substrate is alpha alumina and said substrate coating is gamma alumina. 
     
     
       7. The combustion promoter catalyst of claim 5 wherein said promoter support is gamma alumina. 
     
     
       8. The combustion promoter catalyst of claim 5 wherein said promoter metal comprises from about 100 ppm by weight to about 2500 ppm by weight of said combustion promoter catalyst. 
     
     
       9. The combustoin promoter catalyst of claim 5 wherein said combustion promoter catalyst consists essentially of particulate having a particle size of greater than 200 microns.